Bosch Motronic ML4 Fuel Injection System Components — Removal and Installation (Opel Omega A)

See the note given in Chapter 25.

Throttle switch

1. See. Chapter 25 paragraphs 1-3.

Fuel injectors

2. Disconnect the negative battery cable.

3. Disconnect the wiring from the idle speed controller. Disconnect the hoses and remove the controller.

4. Disconnect the wiring from the injectors (photo).



5. Remove the four bolts securing the fuel distribution line to the intake manifold.

6. Use a screwdriver to remove the clamps securing the injectors to the distributor line (photo).



7. Unscrew the union nut, disconnect the brake servo motor vacuum pipe from the intake manifold (photo).





8. Remove the fuel supply pipe hanger.

9. Loosen the injectors on the distributor line and remove them from the intake manifold (photo). Check the injectors as described in Chapter 25.



10. Installation is carried out in the reverse order; if necessary, replace the injector O-rings (photo).



Material was taken from a resource: OPELBOOK.ru



11. Loosen the clamp and disconnect the air duct from the air flow sensor.

12. Disconnect the multi-pin plug (photo).



13. Release the spring clips and lift the air flow sensor and cover off the air cleaner housing.

14. If necessary, unscrew the sensor from the covering.

15. Wipe the sensor pneumatic valve, check that it moves freely.

16. Installation is carried out in reverse order.

Control unit

17. Pull back the rubber cover, remove the trim panel on the right side at the driver's feet (photo).



18. Unscrew the three mounting screws (photo).



19. Pull back the spring clip, disconnect the multi-pin plug (photo). Remove the control unit.







20. Installation is carried out in reverse order.

Temperature sensor

21. Be guided Chapter 25, paragraphs 18-22.

Idle speed controller

22. Disconnect the wiring from the back of the controller (photo).



23. Loosen the clamps and disconnect the air hoses.

24. Connect the ohmmeter to the regulator terminals, the resistance should be 8 Ohms (photo).





25. Installation is carried out in reverse order.

Control relay

26. See. Chapter 25, paragraphs 29-31.

Fuel pressure regulator

27. See. Chapter 25, paragraphs 32-35.

Throttle body housing

28. The procedure is basically the same as that given in Chapter 25, paragraphs 36-44, except for disconnecting the auxiliary pneumatic valve hose.